PT5103M

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DC DC Converters

DC-DC converters are powerful devices that enable the conversion of an input voltage to an output voltage. They are commonly used in vehicles, power systems, automation and industrial equipment, and consumer electronics. The PT5103M is a step-down DC-DC converter with a high efficiency of up to 97.2%. It has a very small package size of only 3mm x 3mm, making it ideal for space-constrained applications and therefore ideal for applications with a tight form factor. The PT5103M also features a wide input voltage range of 4.5V to 28V, making it suitable for a variety of input voltage applications. It has an adjustable output voltage of 0.6V to 5.5V with a maximum output current of 500mA. So, the PT5103M is suitable for a range of different applications that need to step down the input voltage and current.

Application Fields

The PT5103M is a versatile DC-DC converter designed for applications such as:

• Portable electronic devices, such as smartphones, tablets and laptops
• Industrial and automotive applications, such as emergency lighting, electric vehicle charging, and home automation
• Power systems, such as solar power plants and storage systems
• Consumer electronics, such as televisions and audio systems

Working Principle

The PT5103M is a synchronous step-down DC-DC converter, which means it uses a switching frequency matching the input voltage to convert the power efficiently. It consists of a power switch, which is a high-frequency switching transistor, and an energy storage inductor. The power switch is switched on and off at a frequency equal to the input voltage. When the power switch is on, current flows from the input to the output and through the energy storage inductor. When the power switch is off, energy stored in the inductor is released to the output. This process continues until the desired output voltage is reached, at which point the output voltage is regulated without any further control of the switching frequency.

The PT5103M has a power-good output signal for monitoring the output voltage. This signal triggers a delay time and the switching frequency adjusts to a pre-defined frequency. The pre-defined frequency is proportional to the output voltage and this frequency is monitored to ensure that the output voltage stays within the desired parameters. Additionally, the PT5103M has an enable pin, which can be used to disable the power switch.

The PT5103M has a high switching frequency of up to 2.2MHz and a wide input voltage range, allowing it to be used for applications that require high efficiency and low noise. The PT5103M is a robust converter that is capable of delivering up to 500mA of output current and is suitable for a wide range of applications.

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